Episode Info: The muscles constitute about a half of our total body weight. Not only do they appear in our arms, legs and in our breast, but also the heart is a muscle, as well as the walls of our arteries, which consist of muscle texture. Muscles must carry out work and therefore they need energy, which means sugar and fat.
Story:
The workings of the human body explained by animated characters. .
Watch Once Upon a Time... Life season 1 episode 20 Online Free,
Free movies online, here you can watch movies online in high quality for free without annoying of advertising, just come and enjoy your movies online. LugaTv